Windows 10: Can't connect to 2.4ghz band, 5ghz keeps disconnecting

As the title says, whenever I try to connect to the 2.4ghz band of my Wi-Fi, Windows gives me a "Can't connect to this network" message. Normally this wouldn't be a huge issue, as the 5ghz band is generally faster anyway, but even that has been spotty. When it works, it usually works fine for a few hours, then disconnects for around ten seconds on average. This isn't much, but it's enough to disconnect me from online games or interrupt video streaming, for instance. However, it has sometimes been struggling to connect at all. All this has only been happening on one desktop, and all other devices have been functioning normally. I believe it started after I updated several drivers, one of which stopped Windows from booting, but I was ultimately able to circumvent that and prevent the driver update thanks to system restore.


The network adapter is a TP Link Archer T9E, with the most recent drivers from the manufacturer's site.

The router is a TP Link Archer C9


So far, I've tried (in no particular order):

Un/re-installing network adapter drivers


Updating drivers with Driver Booster (which installs Broadcom drivers, but has no impact on the issue)


Turning off power saving for the adapter


Running malware scans


Rebooting/resetting/updating the router


Running the Windows troubleshooter (which detects issues, but doesn't solve them)


Manually connecting to the network


Forgetting the network


Doing a network reset


Disabling antivirus software (Avast) and Windows firewall


Making a WLAN report, which gives a lot of "The specific network is not available" and "The driver disconnected while associating" errors


Booting in safe mode -- this is the one thing that has actually gotten results: the issues are not present at all in safe mode, which leads me to believe it isn't a hardware problem


Performing a clean boot -- which does not solve anything


Probably a few other things that have slipped my mind.


Any help would be appreciated. I'm happy to provide any more information necessary, or to redo any of the steps above.

:)

 

5Ghz band not there

The 2230 is a 2.4Ghz only networking adapter

Intel® Wireless Solutions

Multi-Stream, Single Band 802.11b/g/n 2x2 and 2.4 GHz

Delivers up to 300 Mbps speed in the 2.4 GHz band with multiple streams for enhanced speed while improving coverage and reliability.

802.11n supports 2.4 and 5Ghz. Typically for chips that support the 5Ghz band you will see 802.11abgn or 802.11ac listed as there is no marking specifically for 5Ghz N support.

Tripp

 

The 2.5ghz band is discoverable and connects fine, and works anywhere in the house. The 5GHz Band is not even discovered, doesn't show up on the list. [A new Lenove).

The 2.5ghz band is discoverable and connects fine, and works anywhere in the house. The
5GHz Band is not even discovered, doesn't show up on the list.

 

Windows 10 Still Killing Internet Connection on 5ghz Band after Install of KB3206632

Hi Steve,

Is this issue still going on? What is the frequency of the disconnect? Are there other troubleshooting steps you have taken aside from the steps you have given above?

Thanks.